When blasting, the air pressure in the vessel or chamber of the machine is the same as the hose connected to the nozzle. This means that there is no pressure differential between the blast pot and the blast line – this allows the abrasive media to meter into the air stream at the blast pot and then run the length of the blast hose out to the nozzle.
Using a pressure vessel the unit can project a greater media velocity for greater abrasive particle velocity which results in faster cleaning of tough contaminants.
More abrasive particles are propelled against the work surface per minute, for a given nozzle size. This translates into higher productivity, particularly on difficult applications.
As the abrasive particles are moving under pressure, there is an increase to the stand-off distance of the blast nozzle from the working surface, producing a larger blast pattern area, while still achieving velocities with enough impact to remove contaminants from the surface of the target.